It doesn't make sense to me that the piece should start with a 17 month rest. Surely it doesn't really start until the first note is played?
replies(10):
a: vocal, instrumental, or mechanical sounds having rhythm, melody, or harmony
b: the science or art of ordering tones or sounds in succession, in combination, and in temporal relationships to produce a composition having unity and continuity
You can certainly play a recording of the piece at whatever speed you desire, and decide if it has rhythm, melody, harmony, unity, and continuity. Extremely slowing the piece down does not remove those things.